Nest Hub Max Camera Live Feed Blank

[u/Totodile0587]

Since 3 weeks I am seeing blank live feed in google home app, google home website and device's screen. I have performed all troubleshooting steps such as restarting, factory reset, keeping it unplugged for 24 hours, removing from home, changing google account but none worked. I tried video call but it also shows blank screen. Microphone totally works fine.

Talked to google support and they said "Since you’ve already gone through all the troubleshooting steps and the issue persists, the next option would typically be a replacement. However, I’m sorry to inform you that the device is out of warranty, and as per Google’s limited warranty policy, we’re unable to offer a replacement at this time."

Can anyone please share a solution? I think the problem would be with automatic firmware upgrade because suddenly live feed stopped working and I don't see a way to downgrade firmware. I also see one or two vertical strips intermittently.